#include <stdio.h>
#include <stdlib.h>
#include <math.h>

float in_dec_num(float num);

int main()
{
	float input_num;
	scanf("%f", &input_num);
	printf("%.2f\n", in_dec_num(input_num));
	return 0;
}

float in_dec_num(float num)
{
	num += 0.005;
	return num;
}
